Word: urbach
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Dates: during 1980-1989
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Doctors have long known that ultraviolet (UV) radiation from the sun produces profound changes in human skin. "Even one day's exposure can cause damage," says Dermatologist Fred Urbach of Temple University in Philadelphia. The most insidious rays are the short wavelength UVB, which prevail during the peak sun hours (between 11 a.m. and 3 p.m.). But new research has shown that even longer UVA waves, which are present all day, can promote skin cancer...
...damage caused by these invisible rays ranges from ordinary sunburn, to the wrinkles and liver spots caused by years of sunbathing, to the precancerous dark patches known as actinic keratosis and, finally, cancer. Each of these is part of the same process, says Urbach. "First you look old, then if you've had a lot more sun, you get keratosis, and after that skin cancer. If we all lived long enough, we would all get skin cancer...